Make Evenly Spaced Out Loop Cuts
Knife Project is a possibility.. (Illustrated with X across, Y up)..


EX  extrude a long edge horizontally, Shift D duplicate, P part off into a new object.
X delete the original extrusion, X delete 'Faces Only' of the new object,  move up in Z, and tweak its X.
Header Menu > Mesh > Knife Project the grid down onto a couple of your segments:




Hide the grid...


Shift D R Z 60
the segments, and Shift R repeat,
Alt M > 'By Distance' merge double vertices.




or, work under a radial Array modifier, if you've got more symmetrical work to do.